Four Emperors. Two Friends. One Destiny. As twilight descends on the 3rd century AD, the Roman Empire is but a shadow of its former self. Decades of usurping emperors, splinter kingdoms and savage wars have left the people beleaguered, the armies weary and the future uncertain. And into this chaos Emperor Diocletian steps, reforming the succession to allow for not one emperor to rule the world, but four. Meanwhile, two boys share a chance meeting in the great city of Treverorum as Diocletian's dream is announced to the imperial court. Throughout the years that follow, they share heartbreak and glory as that dream sours and the empire endures an era of tyranny and dread. Their lives are inextricably linked, their destinies ever-converging as they rise through Rome's savage stations, to the zenith of empire. For Constantine and Maxentius, the purple robes beckon...

Their rivalry will change the world forever. As competition for the imperial throne intensifies, Constantine and Maxentius realise their childhood friendship cannot last. Each man struggles to control their respective quadrant of empire, battered by currents of politics, religion and personal tragedy, threatened by barbarian forces and enemies within. With their positions becoming at once stronger and more troubled, the strained threads of their friendship begin to unravel. Unfortunate words and misunderstandings finally sever their ties, leaving them as bitter opponents in the greatest game of all, with the throne of Rome the prize. It is a matter that can only be settled by outright war...

For one to rule, the other must die. 312 AD is a year of horrific and brutal warfare. Constantine's northern army is a small force, plagued by religious rivalries, but seemingly unstoppable as they invade Maxentius' Italian heartlands. These relentless clashes, incidents of treachery and twists of fortune see Maxentius' armies driven back to Rome. Constantine has his prize in sight, yet his army is diminished and on the verge of revolt. Maxentius meanwhile works to calm a restive and dissenting Roman populace. When the two forces clash in the Battle of the Milvian Bridge, there are factors at work beyond their control and soon they are left with carnage. There is only one way Constantine and Maxentius' rivalry will end. With one on a bloodied sword and the other the sole ruler of Rome...